package com.juyu.reader.author.util;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;

import com.juyu.reader.author.common.Constants;


public class HttpUtil {

	/**
	 * 向指定URL发送GET方法的请求
	 * 
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("Content-type", "hboring-coding-application/client-stream");
			connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 建立实际的连接
			connection.connect();
			// 获取所有响应头字段
			Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet()) {
				System.out.println(key + "--->" + map.get(key));
			}
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送GET请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, byte[] bodyData) throws Exception {
		OutputStream out = null;
		BufferedReader in = null;
		String result = "";

		URL realUrl = new URL(url);
		// 打开和URL之间的连接
		URLConnection connection = realUrl.openConnection();
		// 设置通用的请求属性
		connection.setRequestProperty("Content-type", "application/json; charset=utf-8");
		connection.setRequestProperty("Accept", "application/json");
		// connection.setRequestProperty("accept", "*/*");
		// connection.setRequestProperty("connection", "Keep-Alive");
		// connection.setRequestProperty("Content-type",
		// "hboring-coding-application/client-stream");
		// connection.setRequestProperty("user-agent",
		// "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
		// 发送POST请求必须设置如下两行
		connection.setDoOutput(true);
		connection.setDoInput(true);
		// 获取URLConnection对象对应的输出流
		out = connection.getOutputStream();
		// 发送请求参数
		out.write(bodyData);
		// flush输出流的缓冲
		out.flush();
		// 定义BufferedReader输入流来读取URL的响应
		in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
		String line;
		while ((line = in.readLine()) != null) {
			result += line;
		}

		return result;
	}

	/**
	 * 获取书籍图片全路径
	 * 
	 * @param imagePath
	 * @param imageType
	 *            0默认官方图片，1第三方链接图片
	 * @return
	 */
	public static String getBookImageFullUrl(String imagePath, int imageType) {
		String imageUrl = "";
		if (imageType == 0) {
			if (!StringUtil.isNullOrEmpty(imagePath)) {
				imageUrl = Constants.SERVICE_URL + imagePath;
			}
		} else {
			if (!StringUtil.isNullOrEmpty(imagePath)) {
				imageUrl = imagePath;
			}
		}
		return imageUrl;
	}

	/**
	 * 获取用户头像全路径
	 * 
	 * @param imagePath
	 * @param userType
	 *            // 用户头像类型：默认0，0官方图片上传，1第三方平台图片链接
	 * @return
	 */
	public static String getUserImageFullUrl(String imagePath, int userImageType) {
		String imageUrl = "";
		if (userImageType == 0) {
			if (!StringUtil.isNullOrEmpty(imagePath)) {
				imageUrl = Constants.SOURCE_URL + imagePath;
			}
		} else {
			if (!StringUtil.isNullOrEmpty(imagePath)) {
				imageUrl = imagePath;
			}
		}
		return imageUrl;
	}

	public void printParam(HttpServletRequest request) {
		Map map = new HashMap();
		Enumeration paramNames = request.getParameterNames();
		while (paramNames.hasMoreElements()) {
			String paramName = (String) paramNames.nextElement();

			String[] paramValues = request.getParameterValues(paramName);
			if (paramValues.length == 1) {
				String paramValue = paramValues[0];
				if (paramValue.length() != 0) {
					map.put(paramName, paramValue);
				}
			}
		}

		Set<Map.Entry<String, String>> set = map.entrySet();
		System.out.println("------------------------------");
		for (Map.Entry entry : set) {
			System.out.println(entry.getKey() + ":" + entry.getValue());
		}
		System.out.println("------------------------------");
	}

	public static void main(String[] args) {
		try {
			// 发送 GET 请求
			String s = HttpUtil.sendGet("http://www.baidu.com", "key=123&v=456");
			System.out.println(s);

			// 发送 POST 请求
			String sr = HttpUtil.sendPost("http://www.baidu.com", "key=123&v=456".getBytes("utf-8"));
			System.out.println(sr);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
